Brow-Renewing Serum - This eyebrow serum is formulated to help reduce visible hair shedding and loss by rejuvenating elastin, the protein that anchors hair, promoting thicker, fuller, more shapely looking brows. | New Optimized Tube - This limited edition clear tube is redesigned to elevate your BROW serum experience. A wider opening improves brush saturation and the clear tube ensures fill capacity. | Scientifically Studied - Our results have been clinically tested throughout numerous scientific trials. In a 12-week clinical study, after using this eyebrow serum participants experienced up to a 60% increase in the appearance of brow density and thickness.* | How to Use - If you want to use this brow serum to promote thicker-looking brows, begin by brushing the formula onto clean, dry brows and skin where results are desired. Use a back-and-forth motion for more coverage. Apply twice daily, and reduce to once when desired look is achieved. | Real Science for Real Results - Nulastin's groundbreaking science is rooted in elastin replenishment for hair enhancement. Our clinically proven fomulas range from advanced eyelash serums to scalp care, delivering visibly transformative results.